Microsoft Flow for datetime between 2 times

I am looking to create a microsoft flow to check if an email was received between 18:00 and 18:15 Pacific Time. Ideally this would be a single formula instead of comparing time >= 18:00 and time <= 18:15

Currently I have:

convertTimeZone(triggerOutputs()?['body/receivedDateTime'], 'UTC', 'Pacific Standard Time', 'HH:mm')

to convert the datetime from UTC to PST in HH:mm format. My next thought was to subtract a time (18:00) from this and get the difference in minutes, then checking that this value is between 0 and 15