How much on the turn?

[Caerbannog1]

2nd hand into the session, no reads or stats on villan. How much do you bet here on the turn, obviously I am commiting the whole of my stack, so you could say just push allin. How much do you bet?

Poker Stars - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 8 Players - (LegoPoker HH Converter)

Hero (SB): $14.75
BB: $9.10
UTG: $27.05
UTG+1: $44.25
MP1: $26.15
MP2: $4.65
CO: $17.05
BTN: $18.05

Preflop: Hero is dealt K[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/club.gif[/img] (8 Players)
UTG folds, UTG+1 calls $0.25, <font color="red">MP1 raises to $1.00</font>, 3 folds, <font color="red">Hero raises to $4.00</font>, BB folds, UTG+1 calls $3.75, MP1 folds

Flop: ($9.25) 3[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $8.00</font>, UTG+1 calls $8.00

Turn: ($25.25) 3[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets all-in for $2.75</font>, UTG+1 calls $2.75

River: ($30.75) A[img]/images/graemlins/club.gif[/img] (2 Players - 1 All-In)

Pot Size: $30.75 ($1.45 Rake)