There are different opinions regarding minimum volume per film. I found that below 5ml per 1x35mm x36 exp or 1x120 is NOT recommended.
If you would like to develop 5 x 35mm films at the same time and use 5ml per film:
5x5ml =25ml of hc-110
Now you need to add water to get 1:47 dilution
25+1175=1200ml this is your tank required capacity
If yours is 1030ml you can develop 4 films at the same time or take a chance and see if lower minimum than 5ml per film will be enough