Drawing to a Flush

1st hand 9 handed.
all (2000T)
blinds 25-50

Villain is Button
Hero is CO (7 [img]/images/graemlins/spade.gif[/img]8 [img]/images/graemlins/spade.gif[/img])

2 limps
MP1 raise to 200T
fold - fold
HERO- Call
VILLAIN- raise to 1000T
fold - fold - fold - fold
MP1- Call
HERO- Call

FLOP(3175T)- 3 [img]/images/graemlins/spade.gif[/img]4 [img]/images/graemlins/spade.gif[/img]7 [img]/images/graemlins/club.gif[/img]

MP1- bets 200T
HERO- calls
Villain- raises 1000T (all-in)
MP1- folds
HERO- ??

I realize a fold was the order of the day when villain re-raised pre-flop, so my question is what to do post-flop!
This is my first post so all critics are welcome!