The static may be between 9.5 & 10:1. But that cam is one of the "steep ramp" cams, which will increase cylinder pressure. It could be borderline detonation, with 91 or less octane(93 is the highest in my area), depending on timing, quench distance, sharp edges in the chambers and valve reliefs, etc.

You MUST know ALL the specs, in order to get a good est of the static compression. There is no way to determine, for sure, without actually measuring some of the specs needed..

http://www.wallaceracing.com/cr_test2.php

I ran some numbers thru and came up with 9.59 static.

400 std bore, 75cc heads, 6.7 cc valve reliefs, 039 x 4.3 Fel-Pro gaskets, .020 deck height

Obviously, if the chambers are less than 75cc, and the deck height is less than .020, then the static comp will be higher.

72cc heads and .010 deck will increase static to 10.09.