Are they?
If you ask me there is not enough info. The airframe/engine combination determines the T/R configuration. It's like asking if 767's have pneumatic T/r's. The answer is yes AND no, it depends on the engine.
If the JT9D is fitted to a 767 then the answer to the question is NO they're hydraulic (JT9D is a 767 engine option). I suspect that they are pneumatic on the 747. (I don't have any 747 experience)
The RB211 on the 757 is hydraulic but on the 767 pneumatic.
Provide all the info and you will possibly get the right answer.
Cheers