Got it. 27 is technically a size 9 shoe. In terms of board sizing however only your foot length matters. 27 cm is a great fit on a board that is 26 cm at the inserts. That will allow for all common stance angles and will maintain a bit of barefoot overhang which is needed for leverage.
Now back to yor board. It is really not a bad fit, but that does not make it fun for you. With your specs there are many boards in the 153/4 range that could be fun and super playful if that is what you are looking for.