VBA round up & down by 7 minutes on time

Hi all,

I tried to google search this macro but I cannot find anything close to what I want:

So I have a workbook for my clock-ins and outs, and from next month we're changing format and instead of rounding up&down by 15 minutes as it was until now, it will be rounded by 7. It was easy to calculate but now I just don't wanna bother with it each day.

So clock-ins and outs are going to be rounded the same way:

If I clock-in / out @ 7:07 or 6:53 it will go to 7:00, but if I clock @ 6:52 that will go to 6:45 and if @ 7:08 that will go to 7:15

Hope this is clear enough,

Cell range is: B3:C33

Thanks