Hit the backdoor flush and donked, raise or call?

[KCrow]

Villain is 45/12/1.5

Full Tilt Poker, $0.25/$0.50 NL Hold'em Cash Game, 5 Players
LeggoPoker Hand History Converter

BTN: $43.90
SB: $14.20
BB: $48.50
UTG: $51.40
Hero (CO): $57.25

Pre-Flop: T[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/heart.gif[/img] dealt to Hero (CO)
UTG folds, <font color="red">Hero raises to $1.75</font>, BTN folds, SB calls $1.50, BB calls $1.25

Flop: ($5.25) T[img]/images/graemlins/spade.gif[/img] 7[img]/images/graemlins/heart.gif[/img] J[img]/images/graemlins/club.gif[/img] (3 Players)
SB checks, BB checks, <font color="red">Hero bets $3.75</font>, SB folds, BB calls $3.75

Turn: ($12.75) A[img]/images/graemlins/heart.gif[/img] (2 Players)
BB checks, Hero checks

River: ($12.75) 8[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">BB bets $12.75</font>, <font color="red">Hero...........