Without any reads I flat a lot of hands that I would normally 3-bet just because I don't know if that's a standard raise for him or not.
Also I would make it more like 10, especially if I'm planning on ever 3b bluffing in that spot - which I do.
I might go as far as just 3-betting AK+, JJ+, but any indication that he might be aggro could dramatically change that.