This seems to happen a lot and I'm never sure what to do. Villian just got moved to the table recently so I have no info on him. What do you do?

Seat 1: Hero (6,455)
Seat 5: Villian (3,770)
small blind of 120
big blind of 240
*** HOLE CARDS ***
Dealt to Hero [Jc Kh]
3 fold
Hero raises to 720
1 folds
Villian calls 600
1 folds
*** FLOP *** [5h 9c Qc]
Villian bets 240
Hero ?