The river bluff-raise

[nath]

Full Tilt 1k. Don't know much about villain at this point. Doesn't seem particularly active or aggressive. How is this, as a move and as a size?

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $50/$100
8 players
Converter

Stack sizes:
UTG: $794
UTG+1: $7030
MP1: $5960
MP2: $3523
CO: $3640
Hero: $5700
SB: $9055
BB: $4203

Pre-flop: (8 players) Hero is Button with 6[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/club.gif[/img]
5 folds, <font color="#cc0000">Hero raises to $275</font>, SB calls, BB folds.

Flop: 2[img]/images/graemlins/spade.gif[/img] T[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/diamond.gif[/img] ($650, 2 players)
SB checks, Hero checks.

Turn: 6[img]/images/graemlins/heart.gif[/img] ($650, 2 players)
<font color="#cc0000">SB bets $400</font>, Hero calls.

River: K[img]/images/graemlins/spade.gif[/img] ($1450, 2 players)
<font color="#cc0000">SB bets $600</font>, <font color="#cc0000">Hero raises to $2250</font>