A matrix acidizing job is planned on a sandstone pay zone at a depth of 7000 ft without formation breakdown, by keeping a safety margin of 250 psi with the help of a coil tubing unit. Consider the fracture gradient of 0.7 psi/ft, average specific gravity of the injection fluid as 1.065, and frictional pressure drop of 200 psi.
The maximum surface injection pressure (in psi) is __________. (Rounded off to one decimal place)
[Given: Hydrostatic gradient (psi/ft) = \( 0.433 \times \text{Specific Gravity} \)]