Villain is not pot committed here.
It is just a strange example.
Villain could be on a blind steal. Pre flop to me J9s should have folded or 3 bet to like $75 for a re-steal. J9s is not great but it has a lot of ways to hit if he does get called. With just a call J9s is going to have trouble getting paid off OOP if it does hit.
On the flop hero could bluff the size of the pot and maybe take it if it missed the villain. But what is hero selling? TT+ would have raised pre flop. Not likely hero called with 78s or 79s pre. If hero is on 2 overs trying to take down the pot then villain should call with 2 overs. A donk bet makes no sense here.
A check raise then villain is getting close to pot committed.
A better play is to check the flop and if checked back then bet like 1/2 the pot on the turn. Betting like you want action is actually more intimidating here.
If hero checks the flop and villain bets then I would fold. It is just not spot for the villain to bluff. I would put them on a set.