Hi,
This is the recommended page for checking interoperability.
http://support.netapp.com/matrix
I checked it for you: Looks like,
Brocade Switch 300 and ONTAP 9.5, 7.0 FOS firmware is not compatible, however there are versions in 7.x.x and 6.x.x which shows compatible.
Have attached the snapshot & exported excel.
Thanks!