Volunteering during F-1 visa grace period

[Alvin12]

Hello everyone,
I am an international student currently on F-1 visa.
I am planning to engage in volunteering activity next semester for a charity organization.
The activity will be regulated by a volunteering agreement, which respects all conditions (i.e. besides being unpaid, it respects all other conditions).

I will begin the activity before graduation, however I would like to continue for a month after graduation, before leaving the country.
My question is:
am I allowed to engage in volunteering activities during the 60 days grace period that follows the expiration of the F-1 visa?

Thank you in advance.