What size power inverter do I need?

I have a small pot air compressor I bought from Harbor Freight tool Co. It is 1/3 hp- it draws - 2.6 amps. What size power inverter do I need to buy to start and run this compressor using the 12 volt system on my 2007 Toyota Tacoma V-6 TRUCK??? Thanks guys for any help with answers or web sites to go to to get the answer. All have a nice weekend