Having scored in each of his last four league matches, Volland's strike lifted his team to seventh in front of Germany assistant coach Hansi Flick at Hoffenheim's Rhein-Neckar Arena.
"I just want to have a good season with Hoffenheim and anything else would just be a bonus," Volland said when asked about a possible call up to Joachim Löw's senior Germany side.
Bottom side Eintracht Braunschweig picked up their first point of the season after four defeats with a 1-1 draw at Nuremberg, with the hosts also in the bottom three.
On Saturday, Borussia Dortmund secured their fifth win of the season to maintain their 100 percent record with a 6-2 romp at home to Hamburg to stay top of the league.
After Pep Guardiola's Bayern Munich had briefly claimed top spot with a 2-0 win over Hanover 96, Dortmund replied by routing Torsten Fink's Hamburg in emphatic style.
New signing Pierre-Emerick Aubameyang netted twice, as did Poland striker Robert Lewandowski, as Champions League runners-up Dortmund pulled away after Hamburg had levelled at 2-2.
All four Bundesliga teams - Dortmund, Bayern, Bayer Leverkusen and Schalke - warmed-up for their first Champions League matches in mid-week with comfortable wins over the weekend.
Bayer Leverkusen prepared for their Old Trafford trip to face Manchester United on Tuesday with a convincing 3-1 win over 10-man VfL Wolfsburg to stay third.
Germany winger Sidney Sam put the hosts ahead before Wolfsburg's Croatia striker Ivica Olic levelled just before the break.
Stefan Kießling netted twice to give Leverkusen their fourth win from their opening five games, heading home on 65 minutes before slimming in his second in added time.
Wolfsburg were reduced to 10 men when ex-Bayern Munich midfielder Luiz Gustavo was sent off in the final 10 minutes, for the second time this season. The Brazilian had only just returned from suspension after being dismissed in the 2-0 defeat at Mainz at the end of August.
Schalke 04, who host Steaua Bucharest on Wednesday, continued their revival by picking up their second victory with a 1-0 win over Mainz.
New signing Kevin-Prince Boateng hit the first-half winner in only his second league match since arriving from AC Milan. The victory lifts the Royal Blues up to ninth, while Mainz remain fifth.
Werder Bremen crashed to their third straight defeat when they went down 3-0 at home to Eintracht Frankfurt after new signing Franco di Santo was sent off for kicking an opponent in the face.
Augsburg needed a 90th-minute winner from midfielder Tobias Werner to seal a 2-1 win at home to Freiburg and on Friday VfB Stuttgart earned a 1-0 win in the capital against Hertha Berlin to pick up their second win under caretaker coach Thomas Schneider.