TT profitable stack off here?

If CO is an absolute spazz it's fine. Otherwise you're just isolating yourself against the strongest part of his range. I would usually flat a 3bet oop with TT-QQ and AK and play some postflop. On the plus side you have balanced your '4bet huge' range.

A normal 4bet size would be 2.5x or about $1.50 btw.