$11 NLTRN - 25/50: what is villain's range here?

[pokercurious]

Villain has show himself to be a blufftastic aggro-monkey. He will bet to chase flushes/straight, and then bet on the end when he misses. He randomly goes allin PF. The story of the match so far is that I bleed chips for while, then play calling station if I hit a flop and get a huge chunk of chips:

Blinds 25/50
Hero: 1790 (button)
Villain: 1210

Dealt to Hero: XX

Hero raises to 100
Villain calls 50

Flop: 6[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/spade.gif[/img] 4[img]/images/graemlins/heart.gif[/img]

Villain checks
<font color="red">Hero bets 125</font>
<font color="red">Villain raises to 400</font>
<ul type="square"> [*]What is villain's range here? [*]Assuming that calling is really out of the question (because we might have a little fold equity, what is our shoving range here?[/list]