/usr/bin/VolumeControl is in volumecontrol.app 0.5-3.1build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/bin/../lib/GNUstep/Applications/VolumeControl.app/VolumeControl
/usr/bin/../lib/GNUstep/Applications/VolumeControl.app/VolumeControl