25NL 4 handed with top two, shove turn?

[roll]

No reads on villain.

Poker Stars
No Limit Holdem Ring game
Blinds: $0.10/$0.25
4 players
Converter

Stack sizes:
UTG: $2.75
Button: $32.40
Hero: $25.70
BB: $22.80

Pre-flop: (4 players) Hero is SB with 7[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/spade.gif[/img]
2 folds, <font color="#cc0000">Hero raises to $1</font>, BB calls.

Flop: 6[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/spade.gif[/img] ($2, 2 players)
<font color="#cc0000">Hero bets $1.5</font>, BB calls.

Turn: 7[img]/images/graemlins/diamond.gif[/img] ($5, 2 players)
<font color="#cc0000">Hero bets $3.75</font>, <font color="#cc0000">BB raises to $7.5</font>, Hero?

The board is draw heavy and villain could have worse two pair so I'm thinking shove this turn, anyone disagree?

Also, does the fact that this is 4 handed effect anything?