Flopped straight

Scenario: Party 100+9. Fairly early on but a fairly loose table. I have been playing tighter than most and have only shown down two hands where I had sets vs shorter stacks which I busted out.

Blinds 30/60

Seat 1 is the button
Total number of players : 10
Seat 1: Button (1575)
Seat 2: Hero SB (2245)
Seat 3: BB (1915)
Seat 4: UTG (1220)
Seat 5: UTG+1(1430)
Seat 6: UTG+2 (890)
Seat 7: MP1 (1585)
Seat 8: Villain MP2 (1540)
Seat 9: MP3 (1760)
Seat 10: Cut-off (585)

Hero: 6 [img]/images/graemlins/diamond.gif[/img] 3 [img]/images/graemlins/heart.gif[/img]

UTG folds.
UTG+1 folds.
UTG+2 folds.
MP1 calls (30)
Villain calls (30)
MP3 folds.
Cut-off calls (30)
Button folds.
Hero calls (15)
BB checks.

** Dealing Flop ** : [ 4 [img]/images/graemlins/spade.gif[/img], 5 [img]/images/graemlins/club.gif[/img], 7 [img]/images/graemlins/spade.gif[/img] ]

Hero bets (90)
BB folds.
MP1 calls (90)
Villain calls (90)
Cut-off folds.

** Dealing Turn ** : [ 5 [img]/images/graemlins/heart.gif[/img] ]

Hero bets (200)
MP1 calls (200)
Villain raises (800) to 800

Hero ????

Would also appreciate comments on my flop and turn bets